![]() Paint (like all real-world colors) is reflective, not additive, so its colors don't exactly map to RGB. RGB is an additive system, however - like you learned as a toddler, red plus blue makes purple. For instance, pure yellow is composed of equal values of red and green, and adding increasing amounts of blue makes it increasingly lighter. RGB is a way of generating colors as defined by mixes of the three primaries 0,0,0 denotes black, and in an 8-bit system 255,255,255 denotes white. Watch this: Pinpoint your paint colors with these connected sensors Because branded apps such as Sherwin-Williams and the apps for these sensors use RGB (red, green, blue) primaries to define the colors for matching, that's what I went with in this comparison. ![]() It then translates those into digital values we're more familiar with. You press the sensor against the wall to block out light, then the sensor uses its own light source to read the color wavelengths of the reflected light. Each is a little different in hardware and app design, but they work in a similar way. I tested three color sensors: the Nix Mini, Color Muse and Palette Pico. The aim is to match the color to what shade the wall is now. Chances are it won't be the original color, and that's OK. That's where a color matcher supposedly shines. Good for you! Bad news is, if you touch up your wall with a fresh can of paint, it won't look the same. Let's say you remember exactly what brand, color and sheen you purchased back in 2013. ![]() That perfect shade of blue you painted the living room five years ago is likely a few shades lighter today than when it was fresh. Especially in rooms with a lot of natural light, paint pigments fade over time. Paint doesn't stay the same color forever. ![]()
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